public IEnumerable <IInstruction> As(IType type)
{
EnsureType(type);
var code = new AbcCode(_abc);
code.As(type);
return(code);
}
void RouteException(AbcCode code, ISehHandlerBlock block, int var)
{
var exceptionType = block.ExceptionType;
if (block.PrevHandler == null)
{
//if err is AVM error then we translate it to System.Exception.
//code.GetLocal(var);
//code.As(AvmTypeCode.Error);
//code.PushNull();
//var ifNotError = code.IfEquals();
code.GetLocal(var);
code.As(SystemTypes.Exception, true);
code.PushNull();
var ifExc = code.IfNotEquals();
code.GetLocal(var);
code.As(AvmTypeCode.Error);
code.PushNull();
var ifNotError = code.IfEquals();
CallToException(code, var);
code.CoerceAnyType();
code.SetLocal(var);
//check my exception
var labelNotError = code.Label();
ifExc.BranchTarget = labelNotError;
ifNotError.BranchTarget = labelNotError;
}
code.GetLocal(var);
var handlerInfo = (SehHandlerInfo)block.Tag;
handlerInfo.CheckExceptionLabel = code.Label();
//NOTE: Exception on stack can be routed from previous handlers
code.SetLocal(var);
code.GetLocal(var);
code.As(exceptionType, true);
code.PushNull();
var ifMyException = code.IfNotEquals();
//Routing to another exception handler or rethrow
//Instruction routing = Label();
if (block.NextHandler == null)
{
code.GetLocal(var);
code.Throw();
}
else
{
code.GetLocal(var);
handlerInfo.JumpToNextHandler = code.Goto();
}
//Normal Execution: Prepare stack for handler
var normal = code.Label();
ifMyException.BranchTarget = normal;
code.GetLocal(var);
code.Coerce(exceptionType, true);
//21 instructions for first handler
//11 instructions for other handlers
}